The Quad Lock Sports Armband is the easiest and most secure way to take your smartphone on your next run, bike ride or any outdoor activity.Secure Mounting - The patented dual-stage lock means that your smartphone will stay secure, no matter how fast you pump those armsQuick to attach / detach- No more squeezing your smartphone into an annoying plastic pouch. The simple twist and lock make it easy to attach / detach your smartphoneComfortable - The Quad Lock Sports Armband fits comfortably and securely onto your arm or over activewear. The dual-stage lock means that your smartphone sits slightly raised from the armband, so there is no friction between your arm and the smartphoneTechnical:Nylon / Lycra strapHand-washable materialAdjustable to fit any arm size between circumference 17-38cm to 6.5"-15"Compatible with all Quad Lock cases and Universal Adaptors